Belt-hook-closing machine



I 1,619,137 March 1, 1927. I E w. KNOTT Y BELT HOOK CLOSING MACHINE Filed Nov. 6. 192 4 2 Sheets-Sheet 1 March 1, 1927.

1,619,137 w. KNOTT BELT HOOK CLOSING MACHINE Filed Nov. 6. 1924 2 Sheets-Sheet 2 ul Q 1 .v- I M L6 11 W 1 C r ,r! 1 7 W ,8 d-

S-nuento:

Patented Mar. 1, 1927. i

UNITED STATES PATENT OFFICE.

FRANK W. KNOTT, OF DETROIT, MICHIGAN, ASSIGNOR T0 DETROIT BELT LACER (30., 0F

' 1 DETROIT, .MICHIGAN, A CORPORATION OF MICHIGAN.

nnn'r-noox cnosme MACHINE.

Application filed November Theinvention relates to pressing tools and more particularly to constructions designed for the closing of belt hooks. It is the object of the invention to provide a construction which may be used in connection with relatively wide belts and which is of sufficient powerto simultaneously close all of the hooks for the full width ofv the belt. To this end the invention consists in the construction as hereinafter set forth.

In the drawings:

Figure 1 is a perspective view of the closing tool showing a series of belt hooks in engagement therewith;

Figure 2 is a sectional side elevation;

Figure 3 is aplan View;

Figure 4 is a section on line 4-4 of Figure 2;

Figure 5 is a section on line 5-5 of Figure 2;

Figure 6 is a section on line 6-6 of Figure 4;.

In the present state of the art one type of belt fastener which is extensively used consists of a series of parallelly arranged open hooks attached to a common holding strip and provided with oppositely inwardly extending prongs which may be forced through the thickness ofthe belt. WVith narrow belts such fasteners may be applied by a direct leverage hand tool, but with greater widths the power required to simultaneously close all of --the hooks is beyond which will interfere with. their subsequent ,p

the strength of the average operator. On the other hand, it is highly desirable that all of the hooks should be simultaneously closed, as otherwise there will be a displacement operation. One of the features of the present invention is an actuating mechanism for closing the hooks by astep-by-step opera tion. This permits of increasing the leverage so that each successive actuating movement may be easily performed. Another feature'includes the use'of a hydraulic press through the medium of which the required increase of leverage is obtained. Other features .of' the invention will be referred to more specifically hereinafter. I.

As shown, A is a frame member provided at one endwith a bed portion 13 and at its opposite'end with a cylinder O andhead D for the hydraulic motor. Within the head I e, 1924. Serial No. 748,218.

D is arranged a vertically extending small cylinder E for receiving the reciprocatory plunger F. The upper end of this plunger is connected by a pivot pin G with a yoke member H which embraces the head and has I its lower ends pivoted at I to rock arms 3' connected to a common rock shaft K passing through and journaled in the head. The rock arms J are provided with sockets J for receiving lever handles L which extend di,

therefrom into the cylinder C. A's specifi cally shown, these passages include the passageway N leading from the lower portion of the chamber M into the lower end of the cylinder E and controlled by the check valve 0. There is also a passage P forming an outlet from the cylinder E controlled by a check valve and leading upward through the portion P into a rearward extension of the cylinder O. A third passage R controlled by a check valve S forms a return for the fluid from the cylinder O to the chamber M when the valve S is unse'ated. T is a pin for unseating the valve extending through a portion of the passage R and operated by a trip lever U.

'Within the cylinder C is a piston V which is provided centrally at its forward end with the wedge member WV having the longitudinal slot W through which is passed a in W This pin forms an abutment for one end of the spring which engages a central recess within the piston V and serves to hold said piston normally at the head end of the cylinder G.

X and X are members pivoted upon the pins X? and'X and carrying at their inner ends the rollers X 'for engaging the wedge member W. The outer ends of the members X and X have pivotally attached thereto at Y and Y the jaw members Y and Y ;These jaw members are held in parallel rela-' tion during the rocking of the members X and X through the medium of connections including extensions Y in said jaw members, pivotal links Y and anchor bearings axial plane of the cylinder 0 andcentrally between the awmeinbers Y and Y.- his to'receive the individualhooks and is pro Y on the pins X and X The arrangement is such that when the piston V is moved outward by hydraulic pressure, the wedge W will spread the rollers X rocking the members X and X and moving the jaw members! and Y -oppositely towards On'the'other hand, when the each other. hydraulic pressure is relieved, the spring will return the piston and permit the members V and V to assume their normal positions.

Z is aholder for the belt hooks which extends across the frame member A in the holder is recessed at Z inits forward face vided at itsopposite ends with apertured '"bearingsjZ for the passage of a pin Z for retaining the hooks in engagement. B is a bearing extending across the bed B and above'the same for supporting the belt in relation to the hooks during the closing operation.

In operation, a strip of hooks correspond- 'ing in length to the width of the belt is first engaged with the holder Z and locked in position by the-pin Z Theroperator then places the end portion of the belt over the supporting bearing B so that it will extend into the space between'the prongs of the open hooks. One or both of the: handles L are then manipulated to reciprocate the plunger F throughthe medium of the rock arms J and yoke H. During thenupward stroke of-said plunger fluid fromthe-chamber- M will pass through the passageway N lifting the valve 0 and entering the plunger cylinder E. During the downward: stroke 'of the plunger the valve 0 will seat and the pressure Will unseat; the valveQ, forcing the towards each other step by step.

movement will press .upon the hooks, forc fluid outward'through the passage P and intothe cylinder C. Here it will displace the piston V, the outward movement of which will causethe wedge XV to spread" the roller bearings X and rock the mem bers X- and X, as previously described. The amount of movement imparted to the members X and X is comparatively slight,

but by repeating the reciprocation of theplunger F the aws Y and Y will be moved Such 'power'or step up in the leverage may be effected by properly proportioning the relameans intermediate -said, pistonand said movable jaws for transmitting pressure to the latter, aplunger forpumpingffluid into said cylinder, rock arms oniopposite sides of said cylinder, a yoke connecting said rock arms to said plunger, and apair of handles connected to said rock arms extending di- -vergently therefrom on opposite sides of said bed.

2. A clos ng tool COIIIPIISIDg a frame, a

cylinder at one end thereof, a piston in said cylinder, members pivoted to said frame and provided with rollers at the inner ends thereof, a pair of jaws pivoted to said-members,-and means for moving said jaws in op posite directions toward'eachlother including a. wedgamember positioned on the forward end of said piston.

-53. A closing tool comprising a frame, a cylinder at one end thereof, a pistonin said cylinder, members pivotally. connected to said frame, a pair of jaws pivoted to said members, and meansfor rockingthememhers aforesaid upon the pivots therefor including a Wedge member positioned on the forward end of said piston.

at. A closing tool comprising a frame,-members rockably connected to sa'idframe, oppositely movablepressure jaws 'pivotally connected to sald members, av fluid motor mounted on said" frame, a wedge shaped member associated with saidmotor for rocking-the members aforesaid, and means for holding the jaws in parallel relation during the rocking of said members.

5. A closing tool comprising a frame, a holder thereon for the work to be closed, closing jaws oppositely movable on said frame and upon opposite sides of said holder, means for holding said jaws in parallel relation during the relative movement thereof including extensions in @said jaw members, a cylinder atone end of said frame, a plunger for pumping fluid into said cylinder, .and a pair ;of handles upon opposite sides of, said frame adapted to reciprocate theiplunger.

6. A closing toolcomprising a frame, a cylinder at one end thereof, a piston insaid cylinder, a bedat the oppositeend ofsaid frame, pins-journaled in bearings provided in said bed, members piv'otally-mount'ed at one end on sald-pi'ns, a-palr-ofaws pivoted to said members, andmeans for rocking the members on said pins and actuating said jaws including a wedge member positioned on the forward end of said piston.

7 A closing tool comprising a frame, members rookably connected to said frame, oppositely movable pressure jaws pivotally connected to said members, means for rocking the members aforesaid and actuating said jaws, and means for holding said jaws in parallel relation during the relative 1Q movement thereof including extensions 011 said jaws and links pivoted to the exten- SlOIlS.

In testimony whereof I affix my signature.

FRANK W. KNOTT. 

